Datasheet N74F621N, N74F621D Datasheet (Philips)

INTEGRATED CIRCUITS

74F621

Octal bus transceiver, non-inverting
(open collector)

Product specification 1996 Jan 05
IC15 Data Handbook

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Philips Semiconductors Product specification

74F621Octal bus transceiver, non-inverting (open collector)

FEA TURES

•High-impedance NPN base inputs for reduced loading

(20µA in High and Low states)

•Octal bidirectional bus interface

•Open collector outputs sink 64mA

•Non-inverting

DESCRIPTION

The 74F621 is an octal transceiver featuring non-inverting open
collector bus-compatible outputs in both send and receive
directions. The outputs are capable of sinking 64mA, providing very
good capacitive drive characteristics.

This octal bus transceiver is designed for asynchronous two-way
communication between data buses. The control function
implementation allows for maximum flexibility in timing.

The device allows data transmission from the A bus to the B bus or
from the B bus to the A bus, depending upon the logic levels at the
Enable inputs (OEBA
disable the device so that the buses are effectively isolated.

The dual-enable configuration gives the 74F621 the capability to
store data by the simultaneous enabling of OEBA
output reinforces its input in this transceiver configuration. Thus,
when both control inputs are enabled and all other data sources to
the two sets of the bus lines are at high impedance, both sets of bus
lines (16 in all) will remain in their last states.

and OEAB). The Enable inputs can be used to

and OEAB. Each

PIN CONFIGURATION

1

OEAB

2

A0

3

A1

4

A2

5

A3

6

A4

7

A5

8

A6

9

A7

10 11

GND

TYPICAL

TYPE

PROPAGATION

DELAY

74F621 8.0ns 105mA

20

V

CC

19

OEBA
B0

18

B1

17

B2

16

B3

15

B4

14

B5

13

B6

12

B7

SF01135

TYPICAL SUPPLY CURRENT

(TOTAL)

ORDERING INFORMATION

COMMERCIAL RANGE

DESCRIPTION

VCC = 5V ±10%,

T

= 0°C to +70°C

amb

20-pin plastic DIP N74F621N SOT146-1

20-pin plastic SOL N74F621D SOT163-1

PKG

DWG #

INPUT AND OUTPUT LOADING AND FAN-OUT TABLE

PINS DESCRIPTION

74F(U.L.)

HIGH/LOW

A0 - A7, B0 - B7 Data inputs 1.0/0.033 20µA/20µA
OEBA, OEAB Output Enable inputs 1.0/0.033 20µA/20µA
A0 - A7 Data outputs OC/40 OC/24mA
B0 - B7 Data outputs OC/106.7 OC/64mA

NOTE: One (1.0) FAST unit load is defined as: 20µA in the High state and 0.6mA in the Low state. OC = Open Collector.

LOAD VALUE

HIGH/LOW

1996 Jan 05 853–0380 16185

2

Philips Semiconductors Product specification

OPERATING MODES

L

H

74F621Octal bus transceiver, non-inverting (open collector)

LOGIC SYMBOL

23

A0 A1

1

OEAB

19

OEBA

B0 B1 B2 B3

18 17 16 15 14 13 12 11

VCC= Pin 20
GND = Pin 10

LOGIC DIAGRAM

19

OEBA

1

OEAB

2

A0

3

A1

4

A2

5

A3

456

A2 A3

A4 A5 A67A7

B4 B5 B6 B7

89

SF01126

18

B0

17

B1

16

B2

15

B3

LOGIC SYMBOL (IEEE/IEC)

19
1

2

3

4

5

6

7

9

EN1
EN2

1

2

8

18

17

16

15

14

13

12

11

SF01137

FUNCTION TABLE

INPUTS

OEBA OEAB

L L B data to A bus
H H A data to B bus
H L OFF

B data to A bus
A data to B bus

H = High voltage level
L = Low voltage level
X = Don’t care
OFF= High if pull-up resistor is connected to open collector output

VCC= Pin 20
GND = Pin 10

1996 Jan 05

6

A4

7

A5

8

A6

9

A7

14

13

12

11

SF01130

B4

B5

B6

B7

3

Philips Semiconductors Product specification

I

Current applied to output in Low output state

SYMBOL

PARAMETER

UNIT

IOLLow-level output current

NO TAG

A0–A7

I

24mA

V

V

MAX

B0–B7

I

maximum in ut

Supply current

74F621Octal bus transceiver, non-inverting (open collector)

ABSOLUTE MAXIMUM RATINGS

(Operation beyond the limits set forth in this table may impair the useful life of the device.
Unless otherwise noted these limits are over the operating free-air temperature range.)

SYMBOL

V
V
I

IN

V

OUT

T
T

CC
IN

OUT

amb
stg

Supply voltage –0.5 to +7.0 V
Input voltage –0.5 to +7.0 V
Input current –30 to +5 mA
Voltage applied to output in High output state –0.5 to +5.5 V

pp

p

Operating free-air temperature range 0 to +70 °C
Storage temperature range –65 to +150 °C

RECOMMENDED OPERATING CONDITIONS

V
V
V
I
V

T

CC
IH
IL

IK

OH

amb

Supply voltage 4.5 5.0 5.5 V
High-level input voltage 2.0 V
Low-level input voltage 0.8 V
Input clamp current –18 mA
High-level output current 4.5 V

p

Operating free-air temperature range 0 70 °C

PARAMETER RATING UNIT

p

A0–A7 48 mA
B0–B7 128 mA

LIMITS

MIN NOM MAX

A0–A7 24 mA
B0–B7 64 mA

DC ELECTRICAL CHARACTERISTICS

(Over recommended operating free-air temperature range unless otherwise noted.)

LIMITS

SYMBOL PARAMETER TEST CONDITIONS

I

OH

OL

High-level output current VCC = MIN, VIL = MAX, VIH=MIN, VOH = MAX 250 µA

=
Low-level output
voltage

VCC = MIN,

=

IL

V

= MIN,

IH

,

OL

IOL = 48mA ±10%V
IOL = 64mA ±5%V

V

IK

I

I

IH

I

IL

I

CC

Input clamp voltage VCC = MIN, II = I
Input current at

p

voltage

OEBA, OEAB VCC = MAX, VI = 7.0V 100 µA

others VCC = 0.0V, VI = 5.5V 1 mA

IK

High-level input current VCC = MAX, VI = 2.7V 20 µA
Low-level input current VCC = MAX, VI = 0.5V –20 µA

pp

(total)

I

CCH

I

CCL

VCC = MAX

OEBA = OEAB = A0–A7 = 4.5V 105 140 mA
OEBA = OEAB = 4.5V,

A0–A7 = GND

±10%V

±5%V

MIN

CC

CC

CC

CC

TYP

NO TAG

MAX

0.35 0.50 V

0.35 0.50 V

0.38 0.55 V

0.42 0.55 V

–0.73 –1.2 V

105 140 mA

NOTES:

1. For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions for the applicable type.

2. All typical values are at V

= 5V, T

CC

amb

= 25°C.

UNIT

1996 Jan 05

4

Philips Semiconductors Product specification

74F621Octal bus transceiver, non-inverting (open collector)

AC ELECTRICAL CHARACTERISTICS

LIMITS

SYMBOL PARAMETER

t

PLH

t

PHL

t

PLH

t

PHL

t

PLH

t

PHL

t

PLH

t

PHL

Propagation delay
An to Bn

Propagation delay
Bn to An

Propagation delay
OEBA to An

Propagation delay
OEAB to Bn

AC WAVEFORMS

For all waveforms, VM = 1.5V.

TEST

CONDITION

Waveform 1

Waveform 1

Waveform 2

Waveform 3

VCC = +5V

T

= +25°C

amb

C

= 50pF, RL = 500Ω

L

MIN TYP MAX MIN MAX

6.0

4.0

6.0

3.5

6.0

3.5

7.0

3.5

9.5

6.0

9.0

5.5

10.0

6.5

12.0

6.5

12.0

8.0

12.0

7.5

13.5

10.5

15.0

9.5

VCC = +5V ± 10%

T

= 0°C to +70°C

amb

C

= 50pF, RL = 500Ω

L

5.5

3.5

5.5

3.0

5.5

3.0

6.0

3.0

13.0

8.5

12.5

8.0

14.0

11.0

17.0

10.0

UNIT

ns

ns

ns

ns

An or Bn

Bn or An

V

M

t

PLH

V

M

V

M

Waveform 1. For Non-Inverting Outputs

OEBA

Bn

V

M

t

PLH

V

M

V

M

Waveform 2. Propagation Delay, OEBA to An

t

t

PHL

PHL

V

M

SF01132

OEAB

V

M

SF01138

Bn

V

M

t

PHL

V

M

t

PLH

V

M

V

M

SF01139

Waveform 3. Propagation Delay, OEAB to Bn

1996 Jan 05

5

Philips Semiconductors Product specification

74F621Octal bus transceiver, non-inverting (open collector)

TYPICAL PROPAGATION DELAYS VERSUS LOAD FOR OPEN COLLECTOR OUTPUTS

18

16

14

12

t

Propagation

delay (ns)

10

8

6

4

2

0

0 100 200 300 400 500 600

Load Resistor ()

NOTE:

When using open-collector parts, the value of the pull-up resistor greatly affects the value of the t
resistor value from 500 to 100 will improve the t
changed, the user must take certain that the total I

up to 50% with only slight increase in the t

PLH

current through the resistor and the total IIL’s of the receivers do not exceed the I

OL

maximum specification.

PLH

t

PHL

SF01153

. For example, changing the pull-up

PLH

. However, if the pull-up resistor is

PHL

OL

TEST CIRCUIT AND WAVEFORMS

V

CC

V

PULSE

GENERATOR

IN

R

T

Test Circuit for Open Collector Outputs

DEFINITIONS:

= Load resistor;

R

L

see AC electrical characteristics for value.

C

= Load capacitance includes jig and probe capacitance;

L

see AC electrical characteristics for value.

R

= Termination resistance should be equal to Z

T

pulse generators.

D.U.T.

V

OUT

7.0V
t

R

L

C

R

L

L

NEGATIVE
PULSE

POSITIVE
PULSE

90%

10%

V

M

10%

t

THL (tf

t

TLH (tr

90%

V

M

w

V

M

10%

)

)

t

w

t

TLH (tr

t

THL (tf

)

)

90%

V

M

90%

10%

AMP (V)

0V

AMP (V)

0V

Input Pulse Definition

OUT

of

family

74F

INPUT PULSE REQUIREMENTS

V

amplitude

3.0V 1.5V

rep. rate

M

1MHz 500ns

t

w

t

TLHtTHL

2.5ns 2.5ns

SF00027

1996 Jan 05

6

Philips Semiconductors Product specification

74F621Octal bus transceiver, non-inverting (open collector)

DIP20: plastic dual in-line package; 20 leads (300 mil) SOT146-1

1996 Jan 05

7

Philips Semiconductors Product specification

74F621Octal bus transceiver, non-inverting (open collector)

SO20: plastic small outline package; 20 leads; body width 7.5 mm SOT163-1

1996 Jan 05

8

Philips Semiconductors Product specification

74F621Octal bus transceiver, non-inverting (open collector)

NOTES

1996 Jan 05

9

Philips Semiconductors Product specification

74F621Octal bus transceiver, non-inverting (open collector)

DEFINITIONS

Data Sheet Identification Product Status Definition

Objective Specification

Preliminary Specification

Product Specification

Formative or in Design

Preproduction Product

Full Production

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including circuits, standard cells, and/or software, described or contained herein in order to improve design and/or performance. Philips
Semiconductors assumes no responsibility or liability for the use of any of these products, conveys no license or title under any patent, copyright,
or mask work right to these products, and makes no representations or warranties that these products are free from patent, copyright, or mask
work right infringement, unless otherwise specified. Applications that are described herein for any of these products are for illustrative purposes
only. Philips Semiconductors makes no representation or warranty that such applications will be suitable for the specified use without further testing
or modification.

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or systems where malfunction of a Philips Semiconductors and Philips Electronics North America Corporation Product can reasonably be expected

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indemnify Philips Semiconductors and Philips Electronics North America Corporation for any damages resulting from such improper use or sale.

Philips Semiconductors
811 East Arques Avenue
P.O. Box 3409
Sunnyvale, California 94088–3409
Telephone [phone]

This data sheet contains the design target or goal specifications for product development. Specifications
may change in any manner without notice.

This data sheet contains preliminary data, and supplementary data will be published at a later date. Philips
Semiconductors reserves the right to make changes at any time without notice in order to improve design
and supply the best possible product.

This data sheet contains Final Specifications. Philips Semiconductors reserves the right to make changes
at any time without notice, in order to improve design and supply the best possible product.

Philips Semiconductors and Philips Electronics North America Corporation

register eligible circuits under the Semiconductor Chip Protection Act.

 Copyright Philips Electronics North America Corporation 1996

All rights reserved. Printed in U.S.A.

(print code) Date of release: July 1994
Document order number: 9397-750-05147